He ________be at home because the light in his room is on.

My English teacher was angry           Tom. 

Nanjing isn’t so large __________ Shanghai, however, it’s the second __________ city in East China.

--- What ____ have happened to Kevin? --- He might have run into some trouble. 

________ you interrupt now? Can’t you see I’m on the phone?_ Sorry, Sir, but it’s urgent.